Gentle abdominal stroking ('belly rubbing') of pigs by a human reduces EEG total power and increases EEG frequencies.,Behavioural Brain Research

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Gentle abdominal stroking ('belly rubbing') of pigs by a human reduces EEG total power and increases EEG frequencies.
Behavioural Brain Research ( IF 2.6 ) Pub Date : 2019-04-05 , DOI: 10.1016/j.bbr.2019.04.006
Jean-Loup Rault ₁ , Suzanne Truong ₂ , Lauren Hemsworth ₂ , Matthias Le Chevoir ₂ , Sebastien Bauquier ₂ , Alan Lai ₃

Affiliation

The neurobiological response to gentle touch remains poorly understood, especially in the context of human-animal interaction. A novel approach allowed recording the pig electroencephalogram (EEG) cranially epidurally and wirelessly during positive interactions with a human. Stroking of the pig's abdomen ('belly rubbing'), applied opportunistically, elicited a distinct behavioral response characterized by lateral recumbency, limb stretching, frequent short-lasting grunts and eye closure. Pigs varied in their responsiveness to belly rubbing but all pigs showed it. Their EEG was compared to EEG during human presence and other positive interactions except belly rubbing; isolation; and in the home pen as a baseline. Total EEG power ('Ptot') was lower during belly rubbing, whereas the median frequency ('F50', 5.3 ± 0.9 Hz vs. 3.8 ± 0.9 Hz for other contexts) and the 95% spectral edge frequency ('F95', 45.2 ± 3.2 Hz vs. 40.0 ± 3.2 Hz for other contexts) were higher during belly rubbing compared to other contexts. Lower EEG total power combined with a shift in spectral power distribution toward higher frequencies were linked to behavioral changes indicative of a positive welfare state during belly rubbing. The effects of belly rubbing on animal psychobiology and well-being warrant further research as a model of positive welfare state induced by touch.

中文翻译：

人对猪进行轻柔的腹部抚摸（“腹部摩擦”）会降低脑电图的总功率并增加脑电图的频率。

对轻触的神经生物学反应仍然知之甚少，尤其是在人与动物相互作用的情况下。一种新颖的方法可以在与人的积极互动过程中通过颅外硬膜外和无线方式记录猪脑电图（EEG）。机会性地抚摸猪的腹部（“腹部摩擦”）会引起明显的行为反应，表现为侧卧，四肢伸展，频繁的短时咕unt和闭眼。猪对腹部摩擦的反应能力各不相同，但所有猪都表现出这种反应。在人类存在和其他积极互动过程中，将他们的脑电图与脑电图进行了比较，但腹部按摩除外。隔离; 并以家用笔为基准。在腹部摩擦期间，总的EEG功率（Ptot）较低，而中位频率（'F50'，5.3±0.9 Hz vs. 与其他情况相比，在腹部摩擦期间，其他情况下为3.8±0.9 Hz）和95％的频谱边缘频率（“ F95”为45.2±3.2 Hz，而其他情况下为40.0±3.2 Hz）更高。较低的脑电图总功率与频谱功率分布向较高频率的移动相结合，表明在腹部揉搓过程中行为表现为积极的福利状态。腹部摩擦对动物心理生物学和幸福感的影响值得进一步研究，以作为由触摸诱发的积极福利状态的模型。较低的脑电图总功率与频谱功率分布向较高频率的移动相结合，表明在腹部揉搓过程中行为表现为积极的福利状态。腹部摩擦对动物心理生物学和幸福感的影响值得进一步研究，以作为由触摸诱发的积极福利状态的模型。较低的脑电图总功率与频谱功率分布向较高频率的移动相结合，表明在腹部揉搓过程中行为表现为积极的福利状态。腹部摩擦对动物心理生物学和幸福感的影响值得进一步研究，以作为由触摸诱发的积极福利状态的模型。

更新日期：2019-04-05

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